EZ Meter Pak devices are the industry choice for providing a better solution for multi unit construction needs. EZM main devices are available as main circuit breakers, as main fusible switches or as main lug terminal boxes. The various EZ Meter Pak devices can have main ratings from 225 to 2000 A maximum depending on the version. This EZ Meter Pak 6 inch bus extension section has a 1200 A bus. This bus extension section is for a three phase system. This extension section has a NEMA 3R surface mounting enclosure. The enclosure is 6.00 inches tall, 19.34 inches wide and 6.37 inches deep. The bus extension section is UL Listed.